5g-team
/
srsRAN_4G
mirror of https://github.com/pvnis/srsRAN_4G.git
2
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Added DRMS for UL. Changed chest to chest_dl

Browse Source
master
ismagom 10 years ago
parent 1cbbbe9b9a
commit 45179ea823
11 changed files with 764 additions and 121 deletions
Show Stats Download Patch File Download Diff File

63
lte/phy/include/liblte/phy/ch_estimation/chest.h
Unescape Escape View File

@ -76,21 +76,6 @@ LIBLTE_API void chest_free(chest_t *q);
LIBLTE_API int chest_set_nof_ports(chest_t *q,
uint32_t nof_ports);
LIBLTE_API int chest_init_LTEDL(chest_t *q,
lte_cell_t cell);
LIBLTE_API int chest_ref_LTEDL_slot_port(chest_t *q,
uint32_t nslot,
uint32_t port_id,
lte_cell_t cell);
LIBLTE_API int chest_ref_LTEDL_slot(chest_t *q,
uint32_t nslot,
lte_cell_t cell);
LIBLTE_API int chest_ref_LTEDL(chest_t *q,
lte_cell_t cell);
LIBLTE_API int chest_ce_ref(chest_t *q,
cf_t *input,
uint32_t nslot,
@ -139,10 +124,50 @@ LIBLTE_API void chest_ce_fprint(chest_t *q,
uint32_t nslot,
uint32_t port_id);
LIBLTE_API int chest_ref_symbols(chest_t *q,
uint32_t port_id,
uint32_t nslot,
uint32_t l[2]);
LIBLTE_API int chest_ref_get_symbols(chest_t *q,
uint32_t port_id,
uint32_t nslot,
uint32_t l[2]);
/*********************************************************
*
* Downlink Channel Estimator
*
*********************************************************/
LIBLTE_API int chest_init_LTEDL(chest_t *q,
lte_cell_t cell);
LIBLTE_API int chest_ref_set_LTEDL_slot_port(chest_t *q,
uint32_t nslot,
uint32_t port_id,
lte_cell_t cell);
LIBLTE_API int chest_ref_set_LTEDL_slot(chest_t *q,
uint32_t nslot,
lte_cell_t cell);
LIBLTE_API int chest_ref_set_LTEDL(chest_t *q,
lte_cell_t cell);
/*********************************************************
*
* Uplink Channel Estimator
*
*********************************************************/
LIBLTE_API int chest_init_LTEUL(chest_t *q,
lte_cell_t cell);
LIBLTE_API int chest_ref_set_LTEUL_slot(chest_t *q,
uint32_t nslot,
lte_cell_t cell);
LIBLTE_API int chest_ref_set_LTEUL(chest_t *q,
lte_cell_t cell);
/* High-level API */

20
lte/phy/include/liblte/phy/ch_estimation/refsignal.h
Unescape Escape View File

@ -59,11 +59,31 @@ typedef struct LIBLTE_API{
cf_t *ch_est;
} refsignal_t;
typedef struct LIBLTE_API {
float beta; // amplitude scaling
uint32_t delta_ss; // Set to 0 for PUCCH
uint32_t cyclic_shift;
uint32_t cyclic_shift_for_drms; /* From DCI 0. Set to 0 if no PDCCH with DCI 0 for the same TB
or if the initial PUSCH is semi-persisently scheduled or
if the initial PUSCH is scheduled by the RA response grant */
bool group_hopping_en;
bool sequence_hopping_en;
} refsignal_ul_cfg_t;
LIBLTE_API int refsignal_init_LTEDL(refsignal_t *q,
uint32_t port_id,
uint32_t nslot,
lte_cell_t cell);
LIBLTE_API int refsignal_init_LTEUL_drms_pusch(refsignal_t *q,
uint32_t nof_prb,
uint32_t prb_start,
uint32_t nslot,
lte_cell_t cell,
refsignal_ul_cfg_t *drms_cfg);
LIBLTE_API void refsignal_free(refsignal_t *q);
LIBLTE_API int refsignal_put(refsignal_t *q,

2
lte/phy/include/liblte/phy/common/sequence.h
Unescape Escape View File

@ -40,7 +40,7 @@ LIBLTE_API int sequence_init(sequence_t *q, uint32_t len);
LIBLTE_API void sequence_free(sequence_t *q);
LIBLTE_API int sequence_LTEPRS(sequence_t *q,
LIBLTE_API int sequence_LTE_pr(sequence_t *q,
uint32_t len,
uint32_t seed);

108
lte/phy/lib/ch_estimation/src/chest.c
Unescape Escape View File

@ -259,17 +259,58 @@ int chest_init(chest_t *q, uint32_t nof_re, uint32_t nof_symbols, uint32_t nof_p
return ret;
}
void chest_free(chest_t *q) {
int p, n;
for (p=0;p<q->nof_ports;p++) {
for (n=0;n<NSLOTS_X_FRAME;n++) {
refsignal_free(&q->refsignal[p][n]);
}
}
#ifdef VOLK_INTERP
for (p=0;p<MAX_PORTS;p++) {
interp_free(&q->interp_freq[p]);
interp_free(&q->interp_time[p]);
}
#endif
bzero(q, sizeof(chest_t));
}
/* Fills l[2] with the symbols in the slot nslot that contain references.
* returns the number of symbols with references (in the slot)
*/
int chest_ref_get_symbols(chest_t *q, uint32_t port_id, uint32_t nslot, uint32_t l[2]) {
if (q != NULL &&
port_id < MAX_PORTS &&
nslot < NSLOTS_X_FRAME)
{
memcpy(l, q->refsignal[port_id][nslot].symbols_ref, sizeof(uint32_t) * q->refsignal[port_id][nslot].nsymbols);
return q->refsignal[port_id][nslot].nsymbols;
} else {
return LIBLTE_ERROR_INVALID_INPUTS;
}
}
/*********************************************************************
*
* Downlink Channel estimator
*
*********************************************************************/
int chest_init_LTEDL(chest_t *q, lte_cell_t cell) {
int ret;
ret = chest_init(q, cell.nof_prb * RE_X_RB, CP_NSYMB(cell.cp), cell.nof_ports);
if (ret != LIBLTE_SUCCESS) {
return ret;
} else {
return chest_ref_LTEDL(q, cell);
return chest_ref_set_LTEDL(q, cell);
}
}
int chest_ref_LTEDL_slot_port(chest_t *q, uint32_t nslot, uint32_t port_id, lte_cell_t cell) {
int chest_ref_set_LTEDL_slot_port(chest_t *q, uint32_t nslot, uint32_t port_id, lte_cell_t cell) {
int ret = LIBLTE_ERROR_INVALID_INPUTS;
if (q != NULL &&
@ -293,10 +334,10 @@ int chest_ref_LTEDL_slot_port(chest_t *q, uint32_t nslot, uint32_t port_id, lte_
return ret;
}
int chest_ref_LTEDL_slot(chest_t *q, uint32_t nslot, lte_cell_t cell) {
int chest_ref_set_LTEDL_slot(chest_t *q, uint32_t nslot, lte_cell_t cell) {
int p, ret;
for (p=0;p<q->nof_ports;p++) {
ret = chest_ref_LTEDL_slot_port(q, nslot, p, cell);
ret = chest_ref_set_LTEDL_slot_port(q, nslot, p, cell);
if (ret != LIBLTE_SUCCESS) {
return ret;
}
@ -304,10 +345,10 @@ int chest_ref_LTEDL_slot(chest_t *q, uint32_t nslot, lte_cell_t cell) {
return LIBLTE_SUCCESS;
}
int chest_ref_LTEDL(chest_t *q, lte_cell_t cell) {
int chest_ref_set_LTEDL(chest_t *q, lte_cell_t cell) {
int n, ret;
for (n=0;n<NSLOTS_X_FRAME;n++) {
ret = chest_ref_LTEDL_slot(q, n, cell);
ret = chest_ref_set_LTEDL_slot(q, n, cell);
if (ret != LIBLTE_SUCCESS) {
return ret;
}
@ -315,37 +356,32 @@ int chest_ref_LTEDL(chest_t *q, lte_cell_t cell) {
return LIBLTE_SUCCESS;
}
void chest_free(chest_t *q) {
int p, n;
for (p=0;p<q->nof_ports;p++) {
for (n=0;n<NSLOTS_X_FRAME;n++) {
refsignal_free(&q->refsignal[p][n]);
}
}
#ifdef VOLK_INTERP
for (p=0;p<MAX_PORTS;p++) {
interp_free(&q->interp_freq[p]);
interp_free(&q->interp_time[p]);
}
#endif
bzero(q, sizeof(chest_t));
}
/* Fills l[2] with the symbols in the slot nslot that contain references.
* returns the number of symbols with references (in the slot)
*/
int chest_ref_symbols(chest_t *q, uint32_t port_id, uint32_t nslot, uint32_t l[2]) {
if (q != NULL &&
port_id < MAX_PORTS &&
nslot < NSLOTS_X_FRAME)
{
memcpy(l, q->refsignal[port_id][nslot].symbols_ref, sizeof(uint32_t) * q->refsignal[port_id][nslot].nsymbols);
return q->refsignal[port_id][nslot].nsymbols;
} else {
return LIBLTE_ERROR_INVALID_INPUTS;
}
}
/*********************************************************************
*
* TODO: Uplink Channel estimator
*
*
*********************************************************************/
/** High-level API

276
lte/phy/lib/ch_estimation/src/refsignal.c
Unescape Escape View File

@ -38,48 +38,51 @@
#include "liblte/phy/utils/debug.h"
#include "liblte/phy/common/sequence.h"
#include "ul_rs_tables.h"
#define idx(x, y) (l*nof_refs_x_symbol+i)
int refsignal_v(uint32_t port_id, uint32_t ns, uint32_t symbol_id) {
int v=-1;
switch(port_id) {
case 0:
if (symbol_id == 0) {
v=0;
} else {
v=3;
}
break;
case 1:
if (symbol_id == 0) {
v=3;
} else {
v=0;
}
break;
case 2:
v=3*(ns%2);
break;
case 3:
v=3+3*(ns%2);
break;
int refsignal_v(uint32_t port_id, uint32_t ns, uint32_t symbol_id)
{
int v = -1;
switch (port_id) {
case 0:
if (symbol_id == 0) {
v = 0;
} else {
v = 3;
}
break;
case 1:
if (symbol_id == 0) {
v = 3;
} else {
v = 0;
}
break;
case 2:
v = 3 * (ns % 2);
break;
case 3:
v = 3 + 3 * (ns % 2);
break;
}
return v;
}
uint32_t refsignal_k(uint32_t m, uint32_t v, uint32_t cell_id) {
return 6*m+((v+(cell_id%6))%6);
uint32_t refsignal_k(uint32_t m, uint32_t v, uint32_t cell_id)
{
return 6 * m + ((v + (cell_id % 6)) % 6);
}
int refsignal_put(refsignal_t *q, cf_t *slot_symbols) {
int refsignal_put(refsignal_t * q, cf_t * slot_symbols)
{
uint32_t i;
uint32_t fidx, tidx;
if (q != NULL &&
slot_symbols != NULL)
{
for (i=0;i<q->nof_refs;i++) {
fidx = q->refs[i].freq_idx; // reference frequency index
tidx = q->refs[i].time_idx; // reference time index
if (q != NULL && slot_symbols != NULL) {
for (i = 0; i < q->nof_refs; i++) {
fidx = q->refs[i].freq_idx; // reference frequency index
tidx = q->refs[i].time_idx; // reference time index
slot_symbols[SAMPLE_IDX(q->nof_prb, tidx, fidx)] = q->refs[i].simbol;
}
return LIBLTE_SUCCESS;
@ -91,8 +94,9 @@ int refsignal_put(refsignal_t *q, cf_t *slot_symbols) {
/** Initializes refsignal_t object according to 3GPP 36.211 6.10.1
*
*/
int refsignal_init_LTEDL(refsignal_t *q, uint32_t port_id, uint32_t nslot,
lte_cell_t cell) {
int refsignal_init_LTEDL(refsignal_t * q, uint32_t port_id, uint32_t nslot,
lte_cell_t cell)
{
uint32_t c_init;
uint32_t ns, l, lp[2];
@ -104,12 +108,10 @@ int refsignal_init_LTEDL(refsignal_t *q, uint32_t port_id, uint32_t nslot,
uint32_t mp;
uint32_t nof_refs_x_symbol, nof_ref_symbols;
if (q != NULL &&
port_id < MAX_PORTS &&
nslot < NSLOTS_X_FRAME &&
lte_cell_isvalid(&cell))
{
if (q != NULL &&
port_id < MAX_PORTS &&
nslot < NSLOTS_X_FRAME && lte_cell_isvalid(&cell)) {
bzero(q, sizeof(refsignal_t));
bzero(&seq, sizeof(sequence_t));
@ -131,7 +133,7 @@ int refsignal_init_LTEDL(refsignal_t *q, uint32_t port_id, uint32_t nslot,
q->nof_refs = nof_refs_x_symbol * nof_ref_symbols;
q->nsymbols = nof_ref_symbols;
q->voffset = cell.id%6;
q->voffset = cell.id % 6;
q->nof_prb = cell.nof_prb;
q->symbols_ref = malloc(sizeof(uint32_t) * nof_ref_symbols);
@ -155,8 +157,8 @@ int refsignal_init_LTEDL(refsignal_t *q, uint32_t port_id, uint32_t nslot,
for (l = 0; l < nof_ref_symbols; l++) {
c_init = 1024 * (7 * (ns + 1) + lp[l] + 1) * (2 * cell.id + 1)
+ 2 * cell.id + N_cp;
ret = sequence_LTEPRS(&seq, 2 * 2 * MAX_PRB, c_init);
+ 2 * cell.id + N_cp;
ret = sequence_LTE_pr(&seq, 2 * 2 * MAX_PRB, c_init);
if (ret != LIBLTE_SUCCESS) {
goto free_and_exit;
}
@ -167,19 +169,21 @@ int refsignal_init_LTEDL(refsignal_t *q, uint32_t port_id, uint32_t nslot,
mp = i + MAX_PRB - cell.nof_prb;
/* generate signal */
__real__ q->refs[idx(l,i)].simbol = (1 - 2 * (float) seq.c[2 * mp]) / sqrt(2);
__imag__ q->refs[idx(l,i)].simbol = (1 - 2 * (float) seq.c[2 * mp + 1]) / sqrt(2);
__real__ q->refs[idx(l, i)].simbol =
(1 - 2 * (float) seq.c[2 * mp]) / sqrt(2);
__imag__ q->refs[idx(l, i)].simbol =
(1 - 2 * (float) seq.c[2 * mp + 1]) / sqrt(2);
/* mapping to resource elements */
q->refs[idx(l,i)].freq_idx = refsignal_k(i, (uint32_t) v, cell.id);
q->refs[idx(l,i)].time_idx = lp[l];
q->refs[idx(l, i)].freq_idx = refsignal_k(i, (uint32_t) v, cell.id);
q->refs[idx(l, i)].time_idx = lp[l];
}
}
ret = LIBLTE_SUCCESS;
}
free_and_exit:
if (ret != LIBLTE_ERROR_INVALID_INPUTS) {
sequence_free(&seq);
sequence_free(&seq);
}
if (ret == LIBLTE_ERROR) {
refsignal_free(q);
@ -187,7 +191,179 @@ free_and_exit:
return ret;
}
void refsignal_free(refsignal_t *q) {
// n_drms_2 table 5.5.2.1.1-1 from 36.211
uint32_t n_drms_2[8] = { 0, 6, 3, 4, 2, 8, 10, 9 };
// n_drms_1 table 5.5.2.1.1-2 from 36.211
uint32_t n_drms_1[8] = { 0, 2, 3, 4, 6, 8, 9, 10 };
/* Generation of the reference signal sequence according to Section 5.5.1 of 36.211 */
int rs_sequence(ref_t * refs, uint32_t len, float alpha, uint32_t ns, uint32_t cell_id,
refsignal_ul_cfg_t * cfg)
{
uint32_t i;
// Calculate u and v
uint32_t u, v;
uint32_t f_ss = (((cell_id % 30) + cfg->delta_ss) % 30);
if (cfg->group_hopping_en) {
sequence_t seq;
sequence_LTE_pr(&seq, cell_id / 30, 160);
uint32_t f_gh = 0;
for (i = 0; i < 8; i++) {
f_gh += seq.c[8 * ns + i] << i;
}
sequence_free(&seq);
u = ((f_gh%30) + f_ss) % 30;
} else {
u = f_ss % 30;
}
if (len < 6 * RE_X_RB) {
v = 0;
} else {
if (!cfg->group_hopping_en && cfg->sequence_hopping_en) {
sequence_t seq;
sequence_LTE_pr(&seq, ((cell_id / 30) << 5) + f_ss, 20);
v = seq.c[ns];
sequence_free(&seq);
} else {
v = 0;
}
}
if (len >= 3 * RE_X_RB) {
uint32_t n_sz;
uint32_t q;
float q_hat;
/* get largest prime n_zc<len */
for (i = NOF_PRIME_NUMBERS - 1; i > 0; i--) {
if (prime_numbers[i] < len) {
n_sz = prime_numbers[i];
break;
}
}
q_hat = (float) n_sz *(u + 1) / 31;
if ((((uint32_t) (2 * q_hat)) % 2) == 0) {
q = (uint32_t) (q_hat + 0.5) + v;
} else {
q = (uint32_t) (q_hat + 0.5) - v;
}
cf_t *x_q = malloc(sizeof(cf_t) * n_sz);
if (!x_q) {
perror("malloc");
return LIBLTE_ERROR;
}
for (i = 0; i < n_sz; i++) {
x_q[i] =
cexpf(-I * M_PI * (float) q * (float) i * ((float) i + 1) / n_sz);
}
for (i = 0; i < len; i++) {
refs[i].simbol = cfg->beta * cexpf(I * alpha * i) * x_q[i % n_sz];
}
free(x_q);
} else {
if (len == RE_X_RB) {
for (i = 0; i < len; i++) {
refs[i].simbol = cfg->beta * cexpf(I * (phi_M_sc_12[u][i] * M_PI / 4 + alpha * i));
}
} else {
for (i = 0; i < len; i++) {
refs[i].simbol = cfg->beta * cexpf(I * (phi_M_sc_24[u][i] * M_PI / 4 + alpha * i));
}
}
}
return LIBLTE_SUCCESS;
}
/** Initializes refsignal_t object according to 3GPP 36.211 5.5.2
*
*/
int refsignal_init_LTEUL_drms_pusch(refsignal_t * q, uint32_t nof_prb, uint32_t prb_start,
uint32_t nslot, lte_cell_t cell, refsignal_ul_cfg_t * cfg)
{
uint32_t i;
int ret = LIBLTE_ERROR_INVALID_INPUTS;
uint32_t n_prs;
uint32_t M_sc;
float alpha;
if (q != NULL && nslot < NSLOTS_X_FRAME && lte_cell_isvalid(&cell)) {
bzero(q, sizeof(refsignal_t));
M_sc = nof_prb * RE_X_RB;
q->nof_refs = M_sc;
q->nsymbols = 1;
q->voffset = cell.id % 6;
q->nof_prb = cell.nof_prb;
q->symbols_ref = malloc(sizeof(uint32_t) * 1);
if (!q->symbols_ref) {
perror("malloc");
goto free_and_exit;
}
if (CP_ISNORM(cell.cp)) {
q->symbols_ref[0] = 3;
} else {
q->symbols_ref[0] = 2;
}
q->refs = vec_malloc(q->nof_refs * sizeof(ref_t));
if (!q->refs) {
goto free_and_exit;
}
q->ch_est = vec_malloc(q->nof_refs * sizeof(cf_t));
if (!q->ch_est) {
goto free_and_exit;
}
/* Calculate n_prs */
uint32_t c_init;
sequence_t seq;
c_init = ((cell.id / 30) << 5) + (((cell.id % 30) + cfg->delta_ss) % 30);
ret = sequence_LTE_pr(&seq, 8 * CP_NSYMB(cell.cp) * 20, c_init);
if (ret != LIBLTE_SUCCESS) {
goto free_and_exit;
}
n_prs = 0;
for (i = 0; i < 8; i++) {
n_prs += (seq.c[8 * CP_NSYMB(cell.cp) * nslot + i] << i);
}
sequence_free(&seq);
// Calculate cyclic shift alpha
uint32_t n_cs =
(n_drms_1[cfg->cyclic_shift] +
n_drms_2[cfg->cyclic_shift_for_drms] + n_prs) % 12;
alpha = 2 * M_PI * (n_cs) / 12;
if (rs_sequence(q->refs, M_sc, alpha, cell.id, nslot, cfg)) {
fprintf(stderr, "Error generating RS sequence\n");
goto free_and_exit;
}
/* mapping to resource elements */
for (i=0;i<M_sc;i++) {
q->refs[i].freq_idx = prb_start*RE_X_RB + i;
q->refs[i].time_idx = q->symbols_ref[0];
}
ret = LIBLTE_SUCCESS;
}
free_and_exit:
if (ret == LIBLTE_ERROR) {
refsignal_free(q);
}
return ret;
}
void refsignal_free(refsignal_t * q)
{
if (q->symbols_ref) {
free(q->symbols_ref);
}
@ -199,5 +375,3 @@ void refsignal_free(refsignal_t *q) {
}
bzero(q, sizeof(refsignal_t));
}

127
lte/phy/lib/ch_estimation/src/ul_rs_tables.h
Unescape Escape View File

@ -0,0 +1,127 @@
/**
*
* \section COPYRIGHT
*
* Copyright 2013-2014 The libLTE Developers. See the
* COPYRIGHT file at the top-level directory of this distribution.
*
* \section LICENSE
*
* This file is part of the libLTE library.
*
* libLTE is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* libLTE is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* A copy of the GNU Lesser General Public License can be found in
* the LICENSE file in the top-level directory of this distribution
* and at http://www.gnu.org/licenses/.
*
*/
#include <stdint.h>
// Phi values for M_sc=12 Table 5.5.1.2-1 in 36.211
int phi_M_sc_12[30][12] = {{-1, 1, 3,-3, 3, 3, 1, 1, 3, 1,-3, 3},
{ 1, 1, 3, 3, 3,-1, 1,-3,-3, 1,-3, 3},
{ 1, 1,-3,-3,-3,-1,-3,-3, 1,-3, 1,-1},
{-1, 1, 1, 1, 1,-1,-3,-3, 1,-3, 3,-1},
{-1, 3, 1,-1, 1,-1,-3,-1, 1,-1, 1, 3},
{ 1,-3, 3,-1,-1, 1, 1,-1,-1, 3,-3, 1},
{-1, 3,-3,-3,-3, 3, 1,-1, 3, 3,-3, 1},
{-3,-1,-1,-1, 1,-3, 3,-1, 1,-3, 3, 1},
{ 1,-3, 3, 1,-1,-1,-1, 1, 1, 3,-1, 1},
{ 1,-3,-1, 3, 3,-1,-3, 1, 1, 1, 1, 1},
{-1, 3,-1, 1, 1,-3,-3,-1,-3,-3, 3,-1},
{ 3, 1,-1,-1, 3, 3,-3, 1, 3, 1, 3, 3},
{ 1,-3, 1, 1,-3, 1, 1, 1,-3,-3,-3, 1},
{ 3, 3,-3, 3,-3, 1, 1, 3,-1,-3, 3, 3},
{-3, 1,-1,-3,-1, 3, 1, 3, 3, 3,-1, 1},
{ 3,-1, 1,-3,-1,-1, 1, 1, 3, 1,-1,-3},
{ 1, 3, 1,-1, 1, 3, 3, 3,-1,-1, 3,-1},
{-3, 1, 1, 3,-3, 3,-3,-3, 3, 1, 3,-1},
{-3, 3, 1, 1,-3, 1,-3,-3,-1,-1, 1,-3},
{-1, 3, 1, 3, 1,-1,-1, 3,-3,-1,-3,-1},
{-1,-3, 1, 1, 1, 1, 3, 1,-1, 1,-3,-1},
{-1, 3,-1, 1,-3,-3,-3,-3,-3, 1,-1,-3},
{ 1, 1,-3,-3,-3,-3,-1, 3,-3, 1,-3, 3},
{ 1, 1,-1,-3,-1,-3, 1,-1, 1, 3,-1, 1},
{ 1, 1, 3, 1, 3, 3,-1, 1,-1,-3,-3, 1},
{ 1,-3, 3, 3, 1, 3, 3, 1,-3,-1,-1, 3},
{ 1, 3,-3,-3, 3,-3, 1,-1,-1, 3,-1,-3},
{-3,-1,-3,-1,-3, 3, 1,-1, 1, 3,-3,-3},
{-1, 3,-3, 3,-1, 3, 3,-3, 3, 3,-1,-1},
{ 3,-3,-3,-1,-1,-3,-1, 3,-3, 3, 1,-1}};
// Phi values for M_sc=24 Table 5.5.1.2-2 in 36.211
int phi_M_sc_24[30][24] = {{-1, 3, 1,-3, 3,-1, 1, 3,-3, 3, 1, 3,-3, 3, 1, 1,-1, 1, 3,-3, 3,-3,-1,-3},
{-3, 3,-3,-3,-3, 1,-3,-3, 3,-1, 1, 1, 1, 3, 1,-1, 3,-3,-3, 1, 3, 1, 1,-3},
{ 3,-1, 3, 3, 1, 1,-3, 3, 3, 3, 3, 1,-1, 3,-1, 1, 1,-1,-3,-1,-1, 1, 3, 3},
{-1,-3, 1, 1, 3,-3, 1, 1,-3,-1,-1, 1, 3, 1, 3, 1,-1, 3, 1, 1,-3,-1,-3,-1},
{-1,-1,-1,-3,-3,-1, 1, 1, 3, 3,-1, 3,-1, 1,-1,-3, 1,-1,-3,-3, 1,-3,-1,-1},
{-3, 1, 1, 3,-1, 1, 3, 1,-3, 1,-3, 1, 1,-1,-1, 3,-1,-3, 3,-3,-3,-3, 1, 1},
{ 1, 1,-1,-1, 3,-3,-3, 3,-3, 1,-1,-1, 1,-1, 1, 1,-1,-3,-1, 1,-1, 3,-1,-3},
{-3, 3, 3,-1,-1,-3,-1, 3, 1, 3, 1, 3, 1, 1,-1, 3, 1,-1, 1, 3,-3,-1,-1, 1},
{-3, 1, 3,-3, 1,-1,-3, 3,-3, 3,-1,-1,-1,-1, 1,-3,-3,-3, 1,-3,-3,-3, 1,-3},
{ 1, 1,-3, 3, 3,-1,-3,-1, 3,-3, 3, 3, 3,-1, 1, 1,-3, 1,-1, 1, 1,-3, 1, 1},
{-1, 1,-3,-3, 3,-1, 3,-1,-1,-3,-3,-3,-1,-3,-3, 1,-1, 1, 3, 3,-1, 1,-1, 3},
{ 1, 3, 3,-3,-3, 1, 3, 1,-1,-3,-3,-3, 3, 3,-3, 3, 3,-1,-3, 3,-1, 1,-3, 1},
{ 1, 3, 3, 1, 1, 1,-1,-1, 1,-3, 3,-1, 1, 1,-3, 3, 3,-1,-3, 3,-3,-1,-3,-1},
{ 3,-1,-1,-1,-1,-3,-1, 3, 3, 1,-1, 1, 3, 3, 3,-1, 1, 1,-3, 1, 3,-1,-3, 3},
{-3,-3, 3, 1, 3, 1,-3, 3, 1, 3, 1, 1, 3, 3,-1,-1,-3, 1,-3,-1, 3, 1, 1, 3},
{-1,-1, 1,-3, 1, 3,-3, 1,-1,-3,-1, 3, 1, 3, 1,-1,-3,-3,-1,-1,-3,-3,-3,-1},
{-1,-3, 3,-1,-1,-1,-1, 1, 1,-3, 3, 1, 3, 3, 1,-1, 1,-3, 1,-3, 1, 1,-3,-1},
{ 1, 3,-1, 3, 3,-1,-3, 1,-1,-3, 3, 3, 3,-1, 1, 1, 3,-1,-3,-1, 3,-1,-1,-1},
{ 1, 1, 1, 1, 1,-1, 3,-1,-3, 1, 1, 3,-3, 1,-3,-1, 1, 1,-3,-3, 3, 1, 1,-3},
{ 1, 3, 3, 1,-1,-3, 3,-1, 3, 3, 3,-3, 1,-1, 1,-1,-3,-1, 1, 3,-1, 3,-3,-3},
{-1,-3, 3,-3,-3,-3,-1,-1,-3,-1,-3, 3, 1, 3,-3,-1, 3,-1, 1,-1, 3,-3, 1,-1},
{-3,-3, 1, 1,-1, 1,-1, 1,-1, 3, 1,-3,-1, 1,-1, 1,-1,-1, 3, 3,-3,-1, 1,-3},
{-3,-1,-3, 3, 1,-1,-3,-1,-3,-3, 3,-3, 3,-3,-1, 1, 3, 1,-3, 1, 3, 3,-1,-3},
{-1,-1,-1,-1, 3, 3, 3, 1, 3, 3,-3, 1, 3,-1, 3,-1, 3, 3,-3, 3, 1,-1, 3, 3},
{ 1,-1, 3, 3,-1,-3, 3,-3,-1,-1, 3,-1, 3,-1,-1, 1, 1, 1, 1,-1,-1,-3,-1, 3},
{ 1,-1, 1,-1, 3,-1, 3, 1, 1,-1,-1,-3, 1, 1,-3, 1, 3,-3, 1, 1,-3,-3,-1,-1},
{-3,-1, 1, 3, 1, 1,-3,-1,-1,-3, 3,-3, 3, 1,-3, 3,-3, 1,-1, 1,-3, 1, 1, 1},
{-1,-3, 3, 3, 1, 1, 3,-1,-3,-1,-1,-1, 3, 1,-3,-3,-1, 3,-3,-1,-3,-1,-3,-1},
{-1,-3,-1,-1, 1,-3,-1,-1, 1,-1,-3, 1, 1,-3, 1,-3,-3, 3, 1, 1,-1, 3,-1,-1},
{ 1, 1,-1,-1,-3,-1, 3,-1, 3,-1, 1, 3, 1,-1, 3, 1, 3,-3,-3, 1,-1,-1, 1, 3}};
// Prime numbers used for Section 5.5.1.1 of 36.211
#define NOF_PRIME_NUMBERS 309
uint32_t prime_numbers[NOF_PRIME_NUMBERS] = { 2, 3, 5, 7, 11, 13, 17, 19, 23, 29,
31, 37, 41, 43, 47, 53, 59, 61, 67, 71,
73, 79, 83, 89, 97, 101, 103, 107, 109, 113,
127, 131, 137, 139, 149, 151, 157, 163, 167, 173,
179, 181, 191, 193, 197, 199, 211, 223, 227, 229,
233, 239, 241, 251, 257, 263, 269, 271, 277, 281,
283, 293, 307, 311, 313, 317, 331, 337, 347, 349,
353, 359, 367, 373, 379, 383, 389, 397, 401, 409,
419, 421, 431, 433, 439, 443, 449, 457, 461, 463,
467, 479, 487, 491, 499, 503, 509, 521, 523, 541,
547, 557, 563, 569, 571, 577, 587, 593, 599, 601,
607, 613, 617, 619, 631, 641, 643, 647, 653, 659,
661, 673, 677, 683, 691, 701, 709, 719, 727, 733,
739, 743, 751, 757, 761, 769, 773, 787, 797, 809,
811, 821, 823, 827, 829, 839, 853, 857, 859, 863,
877, 881, 883, 887, 907, 911, 919, 929, 937, 941,
947, 953, 967, 971, 977, 983, 991, 997,1009,1013,
1019,1021,1031,1033,1039,1049,1051,1061,1063,1069,
1087,1091,1093,1097,1103,1109,1117,1123,1129,1151,
1153,1163,1171,1181,1187,1193,1201,1213,1217,1223,
1229,1231,1237,1249,1259,1277,1279,1283,1289,1291,
1297,1301,1303,1307,1319,1321,1327,1361,1367,1373,
1381,1399,1409,1423,1427,1429,1433,1439,1447,1451,
1453,1459,1471,1481,1483,1487,1489,1493,1499,1511,
1523,1531,1543,1549,1553,1559,1567,1571,1579,1583,
1597,1601,1607,1609,1613,1619,1621,1627,1637,1657,
1663,1667,1669,1693,1697,1699,1709,1721,1723,1733,
1741,1747,1753,1759,1777,1783,1787,1789,1801,1811,
1823,1831,1847,1861,1867,1871,1873,1877,1879,1889,
1901,1907,1913,1931,1933,1949,1951,1973,1979,1987,
1993,1997,1999,2003,2011,2017,2027,2029,2039};

23
lte/phy/lib/ch_estimation/test/CMakeLists.txt
Unescape Escape View File

@ -20,13 +20,26 @@
#
########################################################################
# Channel Estimation TEST
# Downlink Channel Estimation TEST
########################################################################
ADD_EXECUTABLE(chest_test chest_test.c)
TARGET_LINK_LIBRARIES(chest_test lte_phy)
ADD_EXECUTABLE(chest_test_dl chest_test_dl.c)
TARGET_LINK_LIBRARIES(chest_test_dl lte_phy)
ADD_TEST(chest_test_dl_cellid0 chest_dl_test -c 0)
ADD_TEST(chest_test_dl_cellid1 chest_dl_test -c 1)
ADD_TEST(chest_test_dl_cellid2 chest_dl_test -c 2)
########################################################################
# Uplink Channel Estimation TEST
########################################################################
ADD_EXECUTABLE(chest_test_ul chest_test_ul.c)
TARGET_LINK_LIBRARIES(chest_test_ul lte_phy)
#ADD_TEST(chest_test_ul_cellid0 chest_ul_test -c 0)
#ADD_TEST(chest_test_ul_cellid1 chest_ul_test -c 1)
#ADD_TEST(chest_test_ul_cellid2 chest_ul_test -c 2)
ADD_TEST(chest_test_all_cellids chest_test)
ADD_TEST(chest_test_cellid chest_test -c 1)

0
lte/phy/lib/ch_estimation/test/chest_test.c → lte/phy/lib/ch_estimation/test/chest_test_dl.c
Unescape Escape View File

249
lte/phy/lib/ch_estimation/test/chest_test_ul.c
Unescape Escape View File

@ -0,0 +1,249 @@
/**
*
* \section COPYRIGHT
*
* Copyright 2013-2014 The libLTE Developers. See the
* COPYRIGHT file at the top-level directory of this distribution.
*
* \section LICENSE
*
* This file is part of the libLTE library.
*
* libLTE is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* libLTE is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* A copy of the GNU Lesser General Public License can be found in
* the LICENSE file in the top-level directory of this distribution
* and at http://www.gnu.org/licenses/.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <unistd.h>
#include <complex.h>
#include "liblte/phy/phy.h"
lte_cell_t cell = {
6, // nof_prb
MAX_PORTS, // nof_ports
1000, // cell_id
CPNORM // cyclic prefix
};
char *output_matlab = NULL;
void usage(char *prog) {
printf("Usage: %s [recov]\n", prog);
printf("\t-r nof_prb [Default %d]\n", cell.nof_prb);
printf("\t-e extended cyclic prefix [Default normal]\n");
printf("\t-c cell_id (1000 tests all). [Default %d]\n", cell.id);
printf("\t-o output matlab file [Default %s]\n",output_matlab?output_matlab:"None");
printf("\t-v increase verbosity\n");
}
void parse_args(int argc, char **argv) {
int opt;
while ((opt = getopt(argc, argv, "recov")) != -1) {
switch(opt) {
case 'r':
cell.nof_prb = atoi(argv[optind]);
break;
case 'e':
cell.cp = CPEXT;
break;
case 'c':
cell.id = atoi(argv[optind]);
break;
case 'o':
output_matlab = argv[optind];
break;
case 'v':
verbose++;
break;
default:
usage(argv[0]);
exit(-1);
}
}
}
int check_mse(float mod, float arg, int n_port) {
INFO("mod=%.4f, arg=%.4f, n_port=%d\n", mod, arg, n_port);
switch(n_port) {
case 0:
if (mod > 0.029) {
return -1;
}
if (arg > 0.029) {
return -1;
}
break;
case 1:
if (mod > 0.012) {
return -1;
}
if (arg > 0.012) {
return -1;
}
break;
case 2:
case 3:
if (mod > 3.33) {
return -1;
}
if (arg > 0.63) {
return -1;
}
break;
default:
return -1;
}
return 0;
}
int main(int argc, char **argv) {
chest_t eq;
cf_t *input = NULL, *ce = NULL, *h = NULL;
refsignal_t refs;
int i, j, n_port, n_slot, cid, num_re;
int ret = -1;
int max_cid;
FILE *fmatlab = NULL;
float mse_mag, mse_phase;
parse_args(argc,argv);
if (output_matlab) {
fmatlab=fopen(output_matlab, "w");
if (!fmatlab) {
perror("fopen");
goto do_exit;
}
}
num_re = cell.nof_prb * RE_X_RB * CP_NSYMB(cell.cp);
input = malloc(num_re * sizeof(cf_t));
if (!input) {
perror("malloc");
goto do_exit;
}
h = malloc(num_re * sizeof(cf_t));
if (!h) {
perror("malloc");
goto do_exit;
}
ce = malloc(num_re * sizeof(cf_t));
if (!ce) {
perror("malloc");
goto do_exit;
}
if (cell.id == 1000) {
cid = 0;
max_cid = 504;
} else {
cid = cell.id;
max_cid = cell.id;
}
while(cid <= max_cid) {
cell.id = cid;
if (chest_init_LTEUL(&eq, cell)) {
fprintf(stderr, "Error initializing equalizer\n");
goto do_exit;
}
for (n_slot=0;n_slot<NSLOTS_X_FRAME;n_slot++) {
for (n_port=0;n_port<cell.nof_ports;n_port++) {
if (refsignal_init_LTEDL(&refs, n_port, n_slot, cell)) {
fprintf(stderr, "Error initiating CRS slot=%d\n", i);
return -1;
}
bzero(input, sizeof(cf_t) * num_re);
for (i=0;i<num_re;i++) {
input[i] = 0.5-rand()/RAND_MAX+I*(0.5-rand()/RAND_MAX);
}
bzero(ce, sizeof(cf_t) * num_re);
bzero(h, sizeof(cf_t) * num_re);
refsignal_put(&refs, input);
for (i=0;i<CP_NSYMB(cell.cp);i++) {
for (j=0;j<cell.nof_prb * RE_X_RB;j++) {
float x = -1+(float) i/CP_NSYMB(cell.cp) + cosf(2 * M_PI * (float) j/cell.nof_prb/RE_X_RB);
h[i*cell.nof_prb * RE_X_RB+j] = (3+x) * cexpf(I * x);
input[i*cell.nof_prb * RE_X_RB+j] *= h[i*cell.nof_prb * RE_X_RB+j];
}
}
chest_ce_slot_port(&eq, input, ce, n_slot, n_port);
mse_mag = mse_phase = 0;
for (i=0;i<num_re;i++) {
mse_mag += (cabsf(h[i]) - cabsf(ce[i])) * (cabsf(h[i]) - cabsf(ce[i])) / num_re;
mse_phase += (cargf(h[i]) - cargf(ce[i])) * (cargf(h[i]) - cargf(ce[i])) / num_re;
}
if (check_mse(mse_mag, mse_phase, n_port)) {
goto do_exit;
}
if (fmatlab) {
fprintf(fmatlab, "input=");
vec_fprint_c(fmatlab, input, num_re);
fprintf(fmatlab, ";\n");
fprintf(fmatlab, "h=");
vec_fprint_c(fmatlab, h, num_re);
fprintf(fmatlab, ";\n");
fprintf(fmatlab, "ce=");
vec_fprint_c(fmatlab, ce, num_re);
fprintf(fmatlab, ";\n");
chest_fprint(&eq, fmatlab, n_slot, n_port);
}
}
}
chest_free(&eq);
cid+=10;
INFO("cid=%d\n", cid);
}
ret = 0;
do_exit:
if (ce) {
free(ce);
}
if (input) {
free(input);
}
if (h) {
free(h);
}
if (!ret) {
printf("OK\n");
} else {
printf("Error at cid=%d, slot=%d, port=%d\n",cid, n_slot, n_port);
}
exit(ret);
}

7
lte/phy/lib/common/src/sequence.c
Unescape Escape View File

@ -25,14 +25,13 @@
*
*/
#include "liblte/phy/common/sequence.h"
#include <stdlib.h>
#include <stdio.h>
#include <strings.h>
#include <assert.h>
#include "liblte/phy/common/sequence.h"
#define Nc 1600
@ -75,7 +74,7 @@ void generate_prs_c(sequence_t *q, uint32_t seed) {
free(x2);
}
int sequence_LTEPRS(sequence_t *q, uint32_t len, uint32_t seed) {
int sequence_LTE_pr(sequence_t *q, uint32_t len, uint32_t seed) {
if (sequence_init(q, len)) {
return LIBLTE_ERROR;
}

10
lte/phy/lib/phch/src/sequences.c
Unescape Escape View File

@ -35,7 +35,7 @@
*/
int sequence_pbch(sequence_t *seq, lte_cp_t cp, uint32_t cell_id) {
bzero(seq, sizeof(sequence_t));
return sequence_LTEPRS(seq, CP_ISNORM(cp)?1920:1728, cell_id);
return sequence_LTE_pr(seq, CP_ISNORM(cp)?1920:1728, cell_id);
}
/**
@ -43,7 +43,7 @@ int sequence_pbch(sequence_t *seq, lte_cp_t cp, uint32_t cell_id) {
*/
int sequence_pcfich(sequence_t *seq, uint32_t nslot, uint32_t cell_id) {
bzero(seq, sizeof(sequence_t));
return sequence_LTEPRS(seq, 32, (nslot/2+1) * (2*cell_id + 1) * 512 + cell_id);
return sequence_LTE_pr(seq, 32, (nslot/2+1) * (2*cell_id + 1) * 512 + cell_id);
}
@ -52,7 +52,7 @@ int sequence_pcfich(sequence_t *seq, uint32_t nslot, uint32_t cell_id) {
*/
int sequence_phich(sequence_t *seq, uint32_t nslot, uint32_t cell_id) {
bzero(seq, sizeof(sequence_t));
return sequence_LTEPRS(seq, 12, (nslot/2+1) * (2*cell_id + 1) * 512 + cell_id);
return sequence_LTE_pr(seq, 12, (nslot/2+1) * (2*cell_id + 1) * 512 + cell_id);
}
/**
@ -60,7 +60,7 @@ int sequence_phich(sequence_t *seq, uint32_t nslot, uint32_t cell_id) {
*/
int sequence_pdcch(sequence_t *seq, uint32_t nslot, uint32_t cell_id, uint32_t len) {
bzero(seq, sizeof(sequence_t));
return sequence_LTEPRS(seq, len, (nslot/2) * 512 + cell_id);
return sequence_LTE_pr(seq, len, (nslot/2) * 512 + cell_id);
}
/**
@ -68,5 +68,5 @@ int sequence_pdcch(sequence_t *seq, uint32_t nslot, uint32_t cell_id, uint32_t l
*/
int sequence_pdsch(sequence_t *seq, unsigned short rnti, int q, uint32_t nslot, uint32_t cell_id, uint32_t len) {
bzero(seq, sizeof(sequence_t));
return sequence_LTEPRS(seq, len, (rnti<<14) + (q<<13) + ((nslot/2)<<9) + cell_id);
return sequence_LTE_pr(seq, len, (rnti<<14) + (q<<13) + ((nslot/2)<<9) + cell_id);
}

Write Preview
Loading…
Cancel
Save